if_vioif.c revision 1.26
1 /* $NetBSD: if_vioif.c,v 1.26 2016/09/27 03:33:32 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 2010 Minoura Makoto. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: if_vioif.c,v 1.26 2016/09/27 03:33:32 pgoyette Exp $"); 30 31 #ifdef _KERNEL_OPT 32 #include "opt_net_mpsafe.h" 33 #endif 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/bus.h> 39 #include <sys/condvar.h> 40 #include <sys/device.h> 41 #include <sys/intr.h> 42 #include <sys/kmem.h> 43 #include <sys/mbuf.h> 44 #include <sys/mutex.h> 45 #include <sys/sockio.h> 46 #include <sys/cpu.h> 47 #include <sys/module.h> 48 49 #include <dev/pci/pcidevs.h> 50 #include <dev/pci/pcireg.h> 51 #include <dev/pci/pcivar.h> 52 #include <dev/pci/virtioreg.h> 53 #include <dev/pci/virtiovar.h> 54 55 #include <net/if.h> 56 #include <net/if_media.h> 57 #include <net/if_ether.h> 58 59 #include <net/bpf.h> 60 61 #include "ioconf.h" 62 63 #ifdef NET_MPSAFE 64 #define VIOIF_MPSAFE 1 65 #endif 66 67 #ifdef SOFTINT_INTR 68 #define VIOIF_SOFTINT_INTR 1 69 #endif 70 71 /* 72 * if_vioifreg.h: 73 */ 74 /* Configuration registers */ 75 #define VIRTIO_NET_CONFIG_MAC 0 /* 8bit x 6byte */ 76 #define VIRTIO_NET_CONFIG_STATUS 6 /* 16bit */ 77 78 /* Feature bits */ 79 #define VIRTIO_NET_F_CSUM (1<<0) 80 #define VIRTIO_NET_F_GUEST_CSUM (1<<1) 81 #define VIRTIO_NET_F_MAC (1<<5) 82 #define VIRTIO_NET_F_GSO (1<<6) 83 #define VIRTIO_NET_F_GUEST_TSO4 (1<<7) 84 #define VIRTIO_NET_F_GUEST_TSO6 (1<<8) 85 #define VIRTIO_NET_F_GUEST_ECN (1<<9) 86 #define VIRTIO_NET_F_GUEST_UFO (1<<10) 87 #define VIRTIO_NET_F_HOST_TSO4 (1<<11) 88 #define VIRTIO_NET_F_HOST_TSO6 (1<<12) 89 #define VIRTIO_NET_F_HOST_ECN (1<<13) 90 #define VIRTIO_NET_F_HOST_UFO (1<<14) 91 #define VIRTIO_NET_F_MRG_RXBUF (1<<15) 92 #define VIRTIO_NET_F_STATUS (1<<16) 93 #define VIRTIO_NET_F_CTRL_VQ (1<<17) 94 #define VIRTIO_NET_F_CTRL_RX (1<<18) 95 #define VIRTIO_NET_F_CTRL_VLAN (1<<19) 96 97 #define VIRTIO_NET_FLAG_BITS \ 98 VIRTIO_COMMON_FLAG_BITS \ 99 "\x14""CTRL_VLAN" \ 100 "\x13""CTRL_RX" \ 101 "\x12""CTRL_VQ" \ 102 "\x11""STATUS" \ 103 "\x10""MRG_RXBUF" \ 104 "\x0f""HOST_UFO" \ 105 "\x0e""HOST_ECN" \ 106 "\x0d""HOST_TSO6" \ 107 "\x0c""HOST_TSO4" \ 108 "\x0b""GUEST_UFO" \ 109 "\x0a""GUEST_ECN" \ 110 "\x09""GUEST_TSO6" \ 111 "\x08""GUEST_TSO4" \ 112 "\x07""GSO" \ 113 "\x06""MAC" \ 114 "\x02""GUEST_CSUM" \ 115 "\x01""CSUM" 116 117 /* Status */ 118 #define VIRTIO_NET_S_LINK_UP 1 119 120 /* Packet header structure */ 121 struct virtio_net_hdr { 122 uint8_t flags; 123 uint8_t gso_type; 124 uint16_t hdr_len; 125 uint16_t gso_size; 126 uint16_t csum_start; 127 uint16_t csum_offset; 128 #if 0 129 uint16_t num_buffers; /* if VIRTIO_NET_F_MRG_RXBUF enabled */ 130 #endif 131 } __packed; 132 133 #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* flags */ 134 #define VIRTIO_NET_HDR_GSO_NONE 0 /* gso_type */ 135 #define VIRTIO_NET_HDR_GSO_TCPV4 1 /* gso_type */ 136 #define VIRTIO_NET_HDR_GSO_UDP 3 /* gso_type */ 137 #define VIRTIO_NET_HDR_GSO_TCPV6 4 /* gso_type */ 138 #define VIRTIO_NET_HDR_GSO_ECN 0x80 /* gso_type, |'ed */ 139 140 #define VIRTIO_NET_MAX_GSO_LEN (65536+ETHER_HDR_LEN) 141 142 /* Control virtqueue */ 143 struct virtio_net_ctrl_cmd { 144 uint8_t class; 145 uint8_t command; 146 } __packed; 147 #define VIRTIO_NET_CTRL_RX 0 148 # define VIRTIO_NET_CTRL_RX_PROMISC 0 149 # define VIRTIO_NET_CTRL_RX_ALLMULTI 1 150 151 #define VIRTIO_NET_CTRL_MAC 1 152 # define VIRTIO_NET_CTRL_MAC_TABLE_SET 0 153 154 #define VIRTIO_NET_CTRL_VLAN 2 155 # define VIRTIO_NET_CTRL_VLAN_ADD 0 156 # define VIRTIO_NET_CTRL_VLAN_DEL 1 157 158 struct virtio_net_ctrl_status { 159 uint8_t ack; 160 } __packed; 161 #define VIRTIO_NET_OK 0 162 #define VIRTIO_NET_ERR 1 163 164 struct virtio_net_ctrl_rx { 165 uint8_t onoff; 166 } __packed; 167 168 struct virtio_net_ctrl_mac_tbl { 169 uint32_t nentries; 170 uint8_t macs[][ETHER_ADDR_LEN]; 171 } __packed; 172 173 struct virtio_net_ctrl_vlan { 174 uint16_t id; 175 } __packed; 176 177 178 /* 179 * if_vioifvar.h: 180 */ 181 struct vioif_softc { 182 device_t sc_dev; 183 184 struct virtio_softc *sc_virtio; 185 struct virtqueue sc_vq[3]; 186 #define VQ_RX 0 187 #define VQ_TX 1 188 #define VQ_CTRL 2 189 190 uint8_t sc_mac[ETHER_ADDR_LEN]; 191 struct ethercom sc_ethercom; 192 short sc_deferred_init_done; 193 194 /* bus_dmamem */ 195 bus_dma_segment_t sc_hdr_segs[1]; 196 struct virtio_net_hdr *sc_hdrs; 197 #define sc_rx_hdrs sc_hdrs 198 struct virtio_net_hdr *sc_tx_hdrs; 199 struct virtio_net_ctrl_cmd *sc_ctrl_cmd; 200 struct virtio_net_ctrl_status *sc_ctrl_status; 201 struct virtio_net_ctrl_rx *sc_ctrl_rx; 202 struct virtio_net_ctrl_mac_tbl *sc_ctrl_mac_tbl_uc; 203 struct virtio_net_ctrl_mac_tbl *sc_ctrl_mac_tbl_mc; 204 205 /* kmem */ 206 bus_dmamap_t *sc_arrays; 207 #define sc_rxhdr_dmamaps sc_arrays 208 bus_dmamap_t *sc_txhdr_dmamaps; 209 bus_dmamap_t *sc_rx_dmamaps; 210 bus_dmamap_t *sc_tx_dmamaps; 211 struct mbuf **sc_rx_mbufs; 212 struct mbuf **sc_tx_mbufs; 213 214 bus_dmamap_t sc_ctrl_cmd_dmamap; 215 bus_dmamap_t sc_ctrl_status_dmamap; 216 bus_dmamap_t sc_ctrl_rx_dmamap; 217 bus_dmamap_t sc_ctrl_tbl_uc_dmamap; 218 bus_dmamap_t sc_ctrl_tbl_mc_dmamap; 219 220 void *sc_rx_softint; 221 222 enum { 223 FREE, INUSE, DONE 224 } sc_ctrl_inuse; 225 kcondvar_t sc_ctrl_wait; 226 kmutex_t sc_ctrl_wait_lock; 227 kmutex_t *sc_tx_lock; 228 kmutex_t *sc_rx_lock; 229 bool sc_stopping; 230 }; 231 #define VIRTIO_NET_TX_MAXNSEGS (16) /* XXX */ 232 #define VIRTIO_NET_CTRL_MAC_MAXENTRIES (64) /* XXX */ 233 234 #define VIOIF_TX_LOCK(_sc) if ((_sc)->sc_tx_lock) mutex_enter((_sc)->sc_tx_lock) 235 #define VIOIF_TX_UNLOCK(_sc) if ((_sc)->sc_tx_lock) mutex_exit((_sc)->sc_tx_lock) 236 #define VIOIF_TX_LOCKED(_sc) (!(_sc)->sc_tx_lock || mutex_owned((_sc)->sc_tx_lock)) 237 #define VIOIF_RX_LOCK(_sc) if ((_sc)->sc_rx_lock) mutex_enter((_sc)->sc_rx_lock) 238 #define VIOIF_RX_UNLOCK(_sc) if ((_sc)->sc_rx_lock) mutex_exit((_sc)->sc_rx_lock) 239 #define VIOIF_RX_LOCKED(_sc) (!(_sc)->sc_rx_lock || mutex_owned((_sc)->sc_rx_lock)) 240 241 /* cfattach interface functions */ 242 static int vioif_match(device_t, cfdata_t, void *); 243 static void vioif_attach(device_t, device_t, void *); 244 static void vioif_deferred_init(device_t); 245 246 /* ifnet interface functions */ 247 static int vioif_init(struct ifnet *); 248 static void vioif_stop(struct ifnet *, int); 249 static void vioif_start(struct ifnet *); 250 static int vioif_ioctl(struct ifnet *, u_long, void *); 251 static void vioif_watchdog(struct ifnet *); 252 253 /* rx */ 254 static int vioif_add_rx_mbuf(struct vioif_softc *, int); 255 static void vioif_free_rx_mbuf(struct vioif_softc *, int); 256 static void vioif_populate_rx_mbufs(struct vioif_softc *); 257 static void vioif_populate_rx_mbufs_locked(struct vioif_softc *); 258 static int vioif_rx_deq(struct vioif_softc *); 259 static int vioif_rx_deq_locked(struct vioif_softc *); 260 static int vioif_rx_vq_done(struct virtqueue *); 261 static void vioif_rx_softint(void *); 262 static void vioif_rx_drain(struct vioif_softc *); 263 264 /* tx */ 265 static int vioif_tx_vq_done(struct virtqueue *); 266 static int vioif_tx_vq_done_locked(struct virtqueue *); 267 static void vioif_tx_drain(struct vioif_softc *); 268 269 /* other control */ 270 static int vioif_updown(struct vioif_softc *, bool); 271 static int vioif_ctrl_rx(struct vioif_softc *, int, bool); 272 static int vioif_set_promisc(struct vioif_softc *, bool); 273 static int vioif_set_allmulti(struct vioif_softc *, bool); 274 static int vioif_set_rx_filter(struct vioif_softc *); 275 static int vioif_rx_filter(struct vioif_softc *); 276 static int vioif_ctrl_vq_done(struct virtqueue *); 277 278 CFATTACH_DECL_NEW(vioif, sizeof(struct vioif_softc), 279 vioif_match, vioif_attach, NULL, NULL); 280 281 static int 282 vioif_match(device_t parent, cfdata_t match, void *aux) 283 { 284 struct virtio_softc *va = aux; 285 286 if (va->sc_childdevid == PCI_PRODUCT_VIRTIO_NETWORK) 287 return 1; 288 289 return 0; 290 } 291 292 /* allocate memory */ 293 /* 294 * dma memory is used for: 295 * sc_rx_hdrs[slot]: metadata array for recieved frames (READ) 296 * sc_tx_hdrs[slot]: metadata array for frames to be sent (WRITE) 297 * sc_ctrl_cmd: command to be sent via ctrl vq (WRITE) 298 * sc_ctrl_status: return value for a command via ctrl vq (READ) 299 * sc_ctrl_rx: parameter for a VIRTIO_NET_CTRL_RX class command 300 * (WRITE) 301 * sc_ctrl_mac_tbl_uc: unicast MAC address filter for a VIRTIO_NET_CTRL_MAC 302 * class command (WRITE) 303 * sc_ctrl_mac_tbl_mc: multicast MAC address filter for a VIRTIO_NET_CTRL_MAC 304 * class command (WRITE) 305 * sc_ctrl_* structures are allocated only one each; they are protected by 306 * sc_ctrl_inuse variable and sc_ctrl_wait condvar. 307 */ 308 /* 309 * dynamically allocated memory is used for: 310 * sc_rxhdr_dmamaps[slot]: bus_dmamap_t array for sc_rx_hdrs[slot] 311 * sc_txhdr_dmamaps[slot]: bus_dmamap_t array for sc_tx_hdrs[slot] 312 * sc_rx_dmamaps[slot]: bus_dmamap_t array for recieved payload 313 * sc_tx_dmamaps[slot]: bus_dmamap_t array for sent payload 314 * sc_rx_mbufs[slot]: mbuf pointer array for recieved frames 315 * sc_tx_mbufs[slot]: mbuf pointer array for sent frames 316 */ 317 static int 318 vioif_alloc_mems(struct vioif_softc *sc) 319 { 320 struct virtio_softc *vsc = sc->sc_virtio; 321 int allocsize, allocsize2, r, rsegs, i; 322 void *vaddr; 323 intptr_t p; 324 int rxqsize, txqsize; 325 326 rxqsize = vsc->sc_vqs[VQ_RX].vq_num; 327 txqsize = vsc->sc_vqs[VQ_TX].vq_num; 328 329 allocsize = sizeof(struct virtio_net_hdr) * rxqsize; 330 allocsize += sizeof(struct virtio_net_hdr) * txqsize; 331 if (vsc->sc_nvqs == 3) { 332 allocsize += sizeof(struct virtio_net_ctrl_cmd) * 1; 333 allocsize += sizeof(struct virtio_net_ctrl_status) * 1; 334 allocsize += sizeof(struct virtio_net_ctrl_rx) * 1; 335 allocsize += sizeof(struct virtio_net_ctrl_mac_tbl) 336 + sizeof(struct virtio_net_ctrl_mac_tbl) 337 + ETHER_ADDR_LEN * VIRTIO_NET_CTRL_MAC_MAXENTRIES; 338 } 339 r = bus_dmamem_alloc(vsc->sc_dmat, allocsize, 0, 0, 340 &sc->sc_hdr_segs[0], 1, &rsegs, BUS_DMA_NOWAIT); 341 if (r != 0) { 342 aprint_error_dev(sc->sc_dev, 343 "DMA memory allocation failed, size %d, " 344 "error code %d\n", allocsize, r); 345 goto err_none; 346 } 347 r = bus_dmamem_map(vsc->sc_dmat, 348 &sc->sc_hdr_segs[0], 1, allocsize, 349 &vaddr, BUS_DMA_NOWAIT); 350 if (r != 0) { 351 aprint_error_dev(sc->sc_dev, 352 "DMA memory map failed, " 353 "error code %d\n", r); 354 goto err_dmamem_alloc; 355 } 356 sc->sc_hdrs = vaddr; 357 memset(vaddr, 0, allocsize); 358 p = (intptr_t) vaddr; 359 p += sizeof(struct virtio_net_hdr) * rxqsize; 360 #define P(name,size) do { sc->sc_ ##name = (void*) p; \ 361 p += size; } while (0) 362 P(tx_hdrs, sizeof(struct virtio_net_hdr) * txqsize); 363 if (vsc->sc_nvqs == 3) { 364 P(ctrl_cmd, sizeof(struct virtio_net_ctrl_cmd)); 365 P(ctrl_status, sizeof(struct virtio_net_ctrl_status)); 366 P(ctrl_rx, sizeof(struct virtio_net_ctrl_rx)); 367 P(ctrl_mac_tbl_uc, sizeof(struct virtio_net_ctrl_mac_tbl)); 368 P(ctrl_mac_tbl_mc, 369 (sizeof(struct virtio_net_ctrl_mac_tbl) 370 + ETHER_ADDR_LEN * VIRTIO_NET_CTRL_MAC_MAXENTRIES)); 371 } 372 #undef P 373 374 allocsize2 = sizeof(bus_dmamap_t) * (rxqsize + txqsize); 375 allocsize2 += sizeof(bus_dmamap_t) * (rxqsize + txqsize); 376 allocsize2 += sizeof(struct mbuf*) * (rxqsize + txqsize); 377 sc->sc_arrays = kmem_zalloc(allocsize2, KM_SLEEP); 378 if (sc->sc_arrays == NULL) 379 goto err_dmamem_map; 380 sc->sc_txhdr_dmamaps = sc->sc_arrays + rxqsize; 381 sc->sc_rx_dmamaps = sc->sc_txhdr_dmamaps + txqsize; 382 sc->sc_tx_dmamaps = sc->sc_rx_dmamaps + rxqsize; 383 sc->sc_rx_mbufs = (void*) (sc->sc_tx_dmamaps + txqsize); 384 sc->sc_tx_mbufs = sc->sc_rx_mbufs + rxqsize; 385 386 #define C(map, buf, size, nsegs, rw, usage) \ 387 do { \ 388 r = bus_dmamap_create(vsc->sc_dmat, size, nsegs, size, 0, \ 389 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, \ 390 &sc->sc_ ##map); \ 391 if (r != 0) { \ 392 aprint_error_dev(sc->sc_dev, \ 393 usage " dmamap creation failed, " \ 394 "error code %d\n", r); \ 395 goto err_reqs; \ 396 } \ 397 } while (0) 398 #define C_L1(map, buf, size, nsegs, rw, usage) \ 399 C(map, buf, size, nsegs, rw, usage); \ 400 do { \ 401 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ ##map, \ 402 &sc->sc_ ##buf, size, NULL, \ 403 BUS_DMA_ ##rw | BUS_DMA_NOWAIT); \ 404 if (r != 0) { \ 405 aprint_error_dev(sc->sc_dev, \ 406 usage " dmamap load failed, " \ 407 "error code %d\n", r); \ 408 goto err_reqs; \ 409 } \ 410 } while (0) 411 #define C_L2(map, buf, size, nsegs, rw, usage) \ 412 C(map, buf, size, nsegs, rw, usage); \ 413 do { \ 414 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ ##map, \ 415 sc->sc_ ##buf, size, NULL, \ 416 BUS_DMA_ ##rw | BUS_DMA_NOWAIT); \ 417 if (r != 0) { \ 418 aprint_error_dev(sc->sc_dev, \ 419 usage " dmamap load failed, " \ 420 "error code %d\n", r); \ 421 goto err_reqs; \ 422 } \ 423 } while (0) 424 for (i = 0; i < rxqsize; i++) { 425 C_L1(rxhdr_dmamaps[i], rx_hdrs[i], 426 sizeof(struct virtio_net_hdr), 1, 427 READ, "rx header"); 428 C(rx_dmamaps[i], NULL, MCLBYTES, 1, 0, "rx payload"); 429 } 430 431 for (i = 0; i < txqsize; i++) { 432 C_L1(txhdr_dmamaps[i], tx_hdrs[i], 433 sizeof(struct virtio_net_hdr), 1, 434 WRITE, "tx header"); 435 C(tx_dmamaps[i], NULL, ETHER_MAX_LEN, 16 /* XXX */, 0, 436 "tx payload"); 437 } 438 439 if (vsc->sc_nvqs == 3) { 440 /* control vq class & command */ 441 C_L2(ctrl_cmd_dmamap, ctrl_cmd, 442 sizeof(struct virtio_net_ctrl_cmd), 1, WRITE, 443 "control command"); 444 445 /* control vq status */ 446 C_L2(ctrl_status_dmamap, ctrl_status, 447 sizeof(struct virtio_net_ctrl_status), 1, READ, 448 "control status"); 449 450 /* control vq rx mode command parameter */ 451 C_L2(ctrl_rx_dmamap, ctrl_rx, 452 sizeof(struct virtio_net_ctrl_rx), 1, WRITE, 453 "rx mode control command"); 454 455 /* control vq MAC filter table for unicast */ 456 /* do not load now since its length is variable */ 457 C(ctrl_tbl_uc_dmamap, NULL, 458 sizeof(struct virtio_net_ctrl_mac_tbl) + 0, 1, WRITE, 459 "unicast MAC address filter command"); 460 461 /* control vq MAC filter table for multicast */ 462 C(ctrl_tbl_mc_dmamap, NULL, 463 (sizeof(struct virtio_net_ctrl_mac_tbl) 464 + ETHER_ADDR_LEN * VIRTIO_NET_CTRL_MAC_MAXENTRIES), 465 1, WRITE, "multicast MAC address filter command"); 466 } 467 #undef C_L2 468 #undef C_L1 469 #undef C 470 471 return 0; 472 473 err_reqs: 474 #define D(map) \ 475 do { \ 476 if (sc->sc_ ##map) { \ 477 bus_dmamap_destroy(vsc->sc_dmat, sc->sc_ ##map); \ 478 sc->sc_ ##map = NULL; \ 479 } \ 480 } while (0) 481 D(ctrl_tbl_mc_dmamap); 482 D(ctrl_tbl_uc_dmamap); 483 D(ctrl_rx_dmamap); 484 D(ctrl_status_dmamap); 485 D(ctrl_cmd_dmamap); 486 for (i = 0; i < txqsize; i++) { 487 D(tx_dmamaps[i]); 488 D(txhdr_dmamaps[i]); 489 } 490 for (i = 0; i < rxqsize; i++) { 491 D(rx_dmamaps[i]); 492 D(rxhdr_dmamaps[i]); 493 } 494 #undef D 495 if (sc->sc_arrays) { 496 kmem_free(sc->sc_arrays, allocsize2); 497 sc->sc_arrays = 0; 498 } 499 err_dmamem_map: 500 bus_dmamem_unmap(vsc->sc_dmat, sc->sc_hdrs, allocsize); 501 err_dmamem_alloc: 502 bus_dmamem_free(vsc->sc_dmat, &sc->sc_hdr_segs[0], 1); 503 err_none: 504 return -1; 505 } 506 507 static void 508 vioif_attach(device_t parent, device_t self, void *aux) 509 { 510 struct vioif_softc *sc = device_private(self); 511 struct virtio_softc *vsc = device_private(parent); 512 uint32_t features; 513 char buf[256]; 514 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 515 u_int flags; 516 int r; 517 518 if (vsc->sc_child != NULL) { 519 aprint_normal(": child already attached for %s; " 520 "something wrong...\n", 521 device_xname(parent)); 522 return; 523 } 524 525 sc->sc_dev = self; 526 sc->sc_virtio = vsc; 527 528 vsc->sc_child = self; 529 vsc->sc_ipl = IPL_NET; 530 vsc->sc_vqs = &sc->sc_vq[0]; 531 vsc->sc_config_change = NULL; 532 vsc->sc_intrhand = virtio_vq_intr; 533 vsc->sc_flags = 0; 534 535 #ifdef VIOIF_MPSAFE 536 vsc->sc_flags |= VIRTIO_F_PCI_INTR_MPSAFE; 537 #endif 538 #ifdef VIOIF_SOFTINT_INTR 539 vsc->sc_flags |= VIRTIO_F_PCI_INTR_SOFTINT; 540 #endif 541 vsc->sc_flags |= VIRTIO_F_PCI_INTR_MSIX; 542 543 features = virtio_negotiate_features(vsc, 544 (VIRTIO_NET_F_MAC | 545 VIRTIO_NET_F_STATUS | 546 VIRTIO_NET_F_CTRL_VQ | 547 VIRTIO_NET_F_CTRL_RX | 548 VIRTIO_F_NOTIFY_ON_EMPTY)); 549 if (features & VIRTIO_NET_F_MAC) { 550 sc->sc_mac[0] = virtio_read_device_config_1(vsc, 551 VIRTIO_NET_CONFIG_MAC+0); 552 sc->sc_mac[1] = virtio_read_device_config_1(vsc, 553 VIRTIO_NET_CONFIG_MAC+1); 554 sc->sc_mac[2] = virtio_read_device_config_1(vsc, 555 VIRTIO_NET_CONFIG_MAC+2); 556 sc->sc_mac[3] = virtio_read_device_config_1(vsc, 557 VIRTIO_NET_CONFIG_MAC+3); 558 sc->sc_mac[4] = virtio_read_device_config_1(vsc, 559 VIRTIO_NET_CONFIG_MAC+4); 560 sc->sc_mac[5] = virtio_read_device_config_1(vsc, 561 VIRTIO_NET_CONFIG_MAC+5); 562 } else { 563 /* code stolen from sys/net/if_tap.c */ 564 struct timeval tv; 565 uint32_t ui; 566 getmicrouptime(&tv); 567 ui = (tv.tv_sec ^ tv.tv_usec) & 0xffffff; 568 memcpy(sc->sc_mac+3, (uint8_t *)&ui, 3); 569 virtio_write_device_config_1(vsc, 570 VIRTIO_NET_CONFIG_MAC+0, 571 sc->sc_mac[0]); 572 virtio_write_device_config_1(vsc, 573 VIRTIO_NET_CONFIG_MAC+1, 574 sc->sc_mac[1]); 575 virtio_write_device_config_1(vsc, 576 VIRTIO_NET_CONFIG_MAC+2, 577 sc->sc_mac[2]); 578 virtio_write_device_config_1(vsc, 579 VIRTIO_NET_CONFIG_MAC+3, 580 sc->sc_mac[3]); 581 virtio_write_device_config_1(vsc, 582 VIRTIO_NET_CONFIG_MAC+4, 583 sc->sc_mac[4]); 584 virtio_write_device_config_1(vsc, 585 VIRTIO_NET_CONFIG_MAC+5, 586 sc->sc_mac[5]); 587 } 588 aprint_normal(": Ethernet address %s\n", ether_sprintf(sc->sc_mac)); 589 snprintb(buf, sizeof(buf), VIRTIO_NET_FLAG_BITS, features); 590 aprint_normal_dev(self, "Features: %s\n", buf); 591 aprint_naive("\n"); 592 593 #ifdef VIOIF_MPSAFE 594 sc->sc_tx_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET); 595 sc->sc_rx_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET); 596 #else 597 sc->sc_tx_lock = NULL; 598 sc->sc_rx_lock = NULL; 599 #endif 600 sc->sc_stopping = false; 601 602 /* 603 * Allocating a virtqueue for Rx 604 */ 605 r = virtio_alloc_vq(vsc, &sc->sc_vq[VQ_RX], 0, 606 MCLBYTES+sizeof(struct virtio_net_hdr), 2, "rx"); 607 if (r != 0) 608 goto err; 609 vsc->sc_nvqs = 1; 610 sc->sc_vq[VQ_RX].vq_done = vioif_rx_vq_done; 611 612 /* 613 * Allocating a virtqueue for Tx 614 */ 615 r = virtio_alloc_vq(vsc, &sc->sc_vq[VQ_TX], 1, 616 (sizeof(struct virtio_net_hdr) + (ETHER_MAX_LEN - ETHER_HDR_LEN)), 617 VIRTIO_NET_TX_MAXNSEGS + 1, "tx"); 618 if (r != 0) 619 goto err; 620 vsc->sc_nvqs = 2; 621 sc->sc_vq[VQ_TX].vq_done = vioif_tx_vq_done; 622 623 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_RX]); 624 virtio_stop_vq_intr(vsc, &sc->sc_vq[VQ_TX]); /* not urgent; do it later */ 625 626 if ((features & VIRTIO_NET_F_CTRL_VQ) && 627 (features & VIRTIO_NET_F_CTRL_RX)) { 628 /* 629 * Allocating a virtqueue for control channel 630 */ 631 r = virtio_alloc_vq(vsc, &sc->sc_vq[VQ_CTRL], 2, 632 NBPG, 1, "control"); 633 if (r != 0) { 634 aprint_error_dev(self, "failed to allocate " 635 "a virtqueue for control channel\n"); 636 goto skip; 637 } 638 639 sc->sc_vq[VQ_CTRL].vq_done = vioif_ctrl_vq_done; 640 cv_init(&sc->sc_ctrl_wait, "ctrl_vq"); 641 mutex_init(&sc->sc_ctrl_wait_lock, MUTEX_DEFAULT, IPL_NET); 642 sc->sc_ctrl_inuse = FREE; 643 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_CTRL]); 644 vsc->sc_nvqs = 3; 645 } 646 skip: 647 648 #ifdef VIOIF_MPSAFE 649 flags = SOFTINT_NET | SOFTINT_MPSAFE; 650 #else 651 flags = SOFTINT_NET; 652 #endif 653 sc->sc_rx_softint = softint_establish(flags, vioif_rx_softint, sc); 654 if (sc->sc_rx_softint == NULL) { 655 aprint_error_dev(self, "cannot establish softint\n"); 656 goto err; 657 } 658 659 if (vioif_alloc_mems(sc) < 0) 660 goto err; 661 662 strlcpy(ifp->if_xname, device_xname(self), IFNAMSIZ); 663 ifp->if_softc = sc; 664 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 665 ifp->if_start = vioif_start; 666 ifp->if_ioctl = vioif_ioctl; 667 ifp->if_init = vioif_init; 668 ifp->if_stop = vioif_stop; 669 ifp->if_capabilities = 0; 670 ifp->if_watchdog = vioif_watchdog; 671 672 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 673 674 if_attach(ifp); 675 ether_ifattach(ifp, sc->sc_mac); 676 677 return; 678 679 err: 680 if (sc->sc_tx_lock) 681 mutex_obj_free(sc->sc_tx_lock); 682 if (sc->sc_rx_lock) 683 mutex_obj_free(sc->sc_rx_lock); 684 685 if (vsc->sc_nvqs == 3) { 686 cv_destroy(&sc->sc_ctrl_wait); 687 mutex_destroy(&sc->sc_ctrl_wait_lock); 688 } 689 690 while (vsc->sc_nvqs > 0) 691 virtio_free_vq(vsc, &sc->sc_vq[--vsc->sc_nvqs]); 692 693 vsc->sc_child = (void*)1; 694 return; 695 } 696 697 /* we need interrupts to make promiscuous mode off */ 698 static void 699 vioif_deferred_init(device_t self) 700 { 701 struct vioif_softc *sc = device_private(self); 702 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 703 int r; 704 705 if (ifp->if_flags & IFF_PROMISC) 706 return; 707 708 r = vioif_set_promisc(sc, false); 709 if (r != 0) 710 aprint_error_dev(self, "resetting promisc mode failed, " 711 "errror code %d\n", r); 712 } 713 714 /* 715 * Interface functions for ifnet 716 */ 717 static int 718 vioif_init(struct ifnet *ifp) 719 { 720 struct vioif_softc *sc = ifp->if_softc; 721 722 vioif_stop(ifp, 0); 723 724 if (!sc->sc_deferred_init_done) { 725 struct virtio_softc *vsc = sc->sc_virtio; 726 727 sc->sc_deferred_init_done = 1; 728 if (vsc->sc_nvqs == 3) 729 vioif_deferred_init(sc->sc_dev); 730 } 731 732 /* Have to set false before vioif_populate_rx_mbufs */ 733 sc->sc_stopping = false; 734 735 vioif_populate_rx_mbufs(sc); 736 737 vioif_updown(sc, true); 738 ifp->if_flags |= IFF_RUNNING; 739 ifp->if_flags &= ~IFF_OACTIVE; 740 vioif_rx_filter(sc); 741 742 return 0; 743 } 744 745 static void 746 vioif_stop(struct ifnet *ifp, int disable) 747 { 748 struct vioif_softc *sc = ifp->if_softc; 749 struct virtio_softc *vsc = sc->sc_virtio; 750 751 /* Take the locks to ensure that ongoing TX/RX finish */ 752 VIOIF_TX_LOCK(sc); 753 VIOIF_RX_LOCK(sc); 754 sc->sc_stopping = true; 755 VIOIF_RX_UNLOCK(sc); 756 VIOIF_TX_UNLOCK(sc); 757 758 /* only way to stop I/O and DMA is resetting... */ 759 virtio_reset(vsc); 760 vioif_rx_deq(sc); 761 vioif_tx_drain(sc); 762 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 763 764 if (disable) 765 vioif_rx_drain(sc); 766 767 virtio_reinit_start(vsc); 768 virtio_negotiate_features(vsc, vsc->sc_features); 769 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_RX]); 770 virtio_stop_vq_intr(vsc, &sc->sc_vq[VQ_TX]); 771 if (vsc->sc_nvqs >= 3) 772 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_CTRL]); 773 virtio_reinit_end(vsc); 774 vioif_updown(sc, false); 775 } 776 777 static void 778 vioif_start(struct ifnet *ifp) 779 { 780 struct vioif_softc *sc = ifp->if_softc; 781 struct virtio_softc *vsc = sc->sc_virtio; 782 struct virtqueue *vq = &sc->sc_vq[VQ_TX]; 783 struct mbuf *m; 784 int queued = 0, retry = 0; 785 786 VIOIF_TX_LOCK(sc); 787 788 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 789 goto out; 790 791 if (sc->sc_stopping) 792 goto out; 793 794 for (;;) { 795 int slot, r; 796 797 IFQ_DEQUEUE(&ifp->if_snd, m); 798 799 if (m == NULL) 800 break; 801 802 retry: 803 r = virtio_enqueue_prep(vsc, vq, &slot); 804 if (r == EAGAIN) { 805 ifp->if_flags |= IFF_OACTIVE; 806 vioif_tx_vq_done_locked(vq); 807 if (retry++ == 0) 808 goto retry; 809 else 810 break; 811 } 812 if (r != 0) 813 panic("enqueue_prep for a tx buffer"); 814 r = bus_dmamap_load_mbuf(vsc->sc_dmat, 815 sc->sc_tx_dmamaps[slot], 816 m, BUS_DMA_WRITE|BUS_DMA_NOWAIT); 817 if (r != 0) { 818 virtio_enqueue_abort(vsc, vq, slot); 819 aprint_error_dev(sc->sc_dev, 820 "tx dmamap load failed, error code %d\n", r); 821 break; 822 } 823 r = virtio_enqueue_reserve(vsc, vq, slot, 824 sc->sc_tx_dmamaps[slot]->dm_nsegs + 1); 825 if (r != 0) { 826 virtio_enqueue_abort(vsc, vq, slot); 827 bus_dmamap_unload(vsc->sc_dmat, 828 sc->sc_tx_dmamaps[slot]); 829 ifp->if_flags |= IFF_OACTIVE; 830 vioif_tx_vq_done_locked(vq); 831 if (retry++ == 0) 832 goto retry; 833 else 834 break; 835 } 836 837 sc->sc_tx_mbufs[slot] = m; 838 839 memset(&sc->sc_tx_hdrs[slot], 0, sizeof(struct virtio_net_hdr)); 840 bus_dmamap_sync(vsc->sc_dmat, sc->sc_tx_dmamaps[slot], 841 0, sc->sc_tx_dmamaps[slot]->dm_mapsize, 842 BUS_DMASYNC_PREWRITE); 843 bus_dmamap_sync(vsc->sc_dmat, sc->sc_txhdr_dmamaps[slot], 844 0, sc->sc_txhdr_dmamaps[slot]->dm_mapsize, 845 BUS_DMASYNC_PREWRITE); 846 virtio_enqueue(vsc, vq, slot, sc->sc_txhdr_dmamaps[slot], true); 847 virtio_enqueue(vsc, vq, slot, sc->sc_tx_dmamaps[slot], true); 848 virtio_enqueue_commit(vsc, vq, slot, false); 849 queued++; 850 bpf_mtap(ifp, m); 851 } 852 853 if (m != NULL) { 854 ifp->if_flags |= IFF_OACTIVE; 855 m_freem(m); 856 } 857 858 if (queued > 0) { 859 virtio_enqueue_commit(vsc, vq, -1, true); 860 ifp->if_timer = 5; 861 } 862 863 out: 864 VIOIF_TX_UNLOCK(sc); 865 } 866 867 static int 868 vioif_ioctl(struct ifnet *ifp, u_long cmd, void *data) 869 { 870 int s, r; 871 872 s = splnet(); 873 874 r = ether_ioctl(ifp, cmd, data); 875 if ((r == 0 && cmd == SIOCSIFFLAGS) || 876 (r == ENETRESET && (cmd == SIOCADDMULTI || cmd == SIOCDELMULTI))) { 877 if (ifp->if_flags & IFF_RUNNING) 878 r = vioif_rx_filter(ifp->if_softc); 879 else 880 r = 0; 881 } 882 883 splx(s); 884 885 return r; 886 } 887 888 void 889 vioif_watchdog(struct ifnet *ifp) 890 { 891 struct vioif_softc *sc = ifp->if_softc; 892 893 if (ifp->if_flags & IFF_RUNNING) 894 vioif_tx_vq_done(&sc->sc_vq[VQ_TX]); 895 } 896 897 898 /* 899 * Recieve implementation 900 */ 901 /* allocate and initialize a mbuf for recieve */ 902 static int 903 vioif_add_rx_mbuf(struct vioif_softc *sc, int i) 904 { 905 struct mbuf *m; 906 int r; 907 908 MGETHDR(m, M_DONTWAIT, MT_DATA); 909 if (m == NULL) 910 return ENOBUFS; 911 MCLGET(m, M_DONTWAIT); 912 if ((m->m_flags & M_EXT) == 0) { 913 m_freem(m); 914 return ENOBUFS; 915 } 916 sc->sc_rx_mbufs[i] = m; 917 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 918 r = bus_dmamap_load_mbuf(sc->sc_virtio->sc_dmat, 919 sc->sc_rx_dmamaps[i], 920 m, BUS_DMA_READ|BUS_DMA_NOWAIT); 921 if (r) { 922 m_freem(m); 923 sc->sc_rx_mbufs[i] = 0; 924 return r; 925 } 926 927 return 0; 928 } 929 930 /* free a mbuf for recieve */ 931 static void 932 vioif_free_rx_mbuf(struct vioif_softc *sc, int i) 933 { 934 bus_dmamap_unload(sc->sc_virtio->sc_dmat, sc->sc_rx_dmamaps[i]); 935 m_freem(sc->sc_rx_mbufs[i]); 936 sc->sc_rx_mbufs[i] = NULL; 937 } 938 939 /* add mbufs for all the empty recieve slots */ 940 static void 941 vioif_populate_rx_mbufs(struct vioif_softc *sc) 942 { 943 VIOIF_RX_LOCK(sc); 944 vioif_populate_rx_mbufs_locked(sc); 945 VIOIF_RX_UNLOCK(sc); 946 } 947 948 static void 949 vioif_populate_rx_mbufs_locked(struct vioif_softc *sc) 950 { 951 struct virtio_softc *vsc = sc->sc_virtio; 952 int i, r, ndone = 0; 953 struct virtqueue *vq = &sc->sc_vq[VQ_RX]; 954 955 KASSERT(VIOIF_RX_LOCKED(sc)); 956 957 if (sc->sc_stopping) 958 return; 959 960 for (i = 0; i < vq->vq_num; i++) { 961 int slot; 962 r = virtio_enqueue_prep(vsc, vq, &slot); 963 if (r == EAGAIN) 964 break; 965 if (r != 0) 966 panic("enqueue_prep for rx buffers"); 967 if (sc->sc_rx_mbufs[slot] == NULL) { 968 r = vioif_add_rx_mbuf(sc, slot); 969 if (r != 0) { 970 printf("%s: rx mbuf allocation failed, " 971 "error code %d\n", 972 device_xname(sc->sc_dev), r); 973 break; 974 } 975 } 976 r = virtio_enqueue_reserve(vsc, vq, slot, 977 sc->sc_rx_dmamaps[slot]->dm_nsegs + 1); 978 if (r != 0) { 979 vioif_free_rx_mbuf(sc, slot); 980 break; 981 } 982 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rxhdr_dmamaps[slot], 983 0, sizeof(struct virtio_net_hdr), BUS_DMASYNC_PREREAD); 984 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rx_dmamaps[slot], 985 0, MCLBYTES, BUS_DMASYNC_PREREAD); 986 virtio_enqueue(vsc, vq, slot, sc->sc_rxhdr_dmamaps[slot], false); 987 virtio_enqueue(vsc, vq, slot, sc->sc_rx_dmamaps[slot], false); 988 virtio_enqueue_commit(vsc, vq, slot, false); 989 ndone++; 990 } 991 if (ndone > 0) 992 virtio_enqueue_commit(vsc, vq, -1, true); 993 } 994 995 /* dequeue recieved packets */ 996 static int 997 vioif_rx_deq(struct vioif_softc *sc) 998 { 999 int r; 1000 1001 KASSERT(sc->sc_stopping); 1002 1003 VIOIF_RX_LOCK(sc); 1004 r = vioif_rx_deq_locked(sc); 1005 VIOIF_RX_UNLOCK(sc); 1006 1007 return r; 1008 } 1009 1010 /* dequeue recieved packets */ 1011 static int 1012 vioif_rx_deq_locked(struct vioif_softc *sc) 1013 { 1014 struct virtio_softc *vsc = sc->sc_virtio; 1015 struct virtqueue *vq = &sc->sc_vq[VQ_RX]; 1016 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1017 struct mbuf *m; 1018 int r = 0; 1019 int slot, len; 1020 1021 KASSERT(VIOIF_RX_LOCKED(sc)); 1022 1023 while (virtio_dequeue(vsc, vq, &slot, &len) == 0) { 1024 len -= sizeof(struct virtio_net_hdr); 1025 r = 1; 1026 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rxhdr_dmamaps[slot], 1027 0, sizeof(struct virtio_net_hdr), 1028 BUS_DMASYNC_POSTREAD); 1029 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rx_dmamaps[slot], 1030 0, MCLBYTES, 1031 BUS_DMASYNC_POSTREAD); 1032 m = sc->sc_rx_mbufs[slot]; 1033 KASSERT(m != NULL); 1034 bus_dmamap_unload(vsc->sc_dmat, sc->sc_rx_dmamaps[slot]); 1035 sc->sc_rx_mbufs[slot] = 0; 1036 virtio_dequeue_commit(vsc, vq, slot); 1037 m_set_rcvif(m, ifp); 1038 m->m_len = m->m_pkthdr.len = len; 1039 ifp->if_ipackets++; 1040 bpf_mtap(ifp, m); 1041 1042 VIOIF_RX_UNLOCK(sc); 1043 if_percpuq_enqueue(ifp->if_percpuq, m); 1044 VIOIF_RX_LOCK(sc); 1045 1046 if (sc->sc_stopping) 1047 break; 1048 } 1049 1050 return r; 1051 } 1052 1053 /* rx interrupt; call _dequeue above and schedule a softint */ 1054 static int 1055 vioif_rx_vq_done(struct virtqueue *vq) 1056 { 1057 struct virtio_softc *vsc = vq->vq_owner; 1058 struct vioif_softc *sc = device_private(vsc->sc_child); 1059 int r = 0; 1060 1061 #ifdef VIOIF_SOFTINT_INTR 1062 KASSERT(!cpu_intr_p()); 1063 #endif 1064 1065 VIOIF_RX_LOCK(sc); 1066 1067 if (sc->sc_stopping) 1068 goto out; 1069 1070 r = vioif_rx_deq_locked(sc); 1071 if (r) 1072 #ifdef VIOIF_SOFTINT_INTR 1073 vioif_populate_rx_mbufs_locked(sc); 1074 #else 1075 softint_schedule(sc->sc_rx_softint); 1076 #endif 1077 1078 out: 1079 VIOIF_RX_UNLOCK(sc); 1080 return r; 1081 } 1082 1083 /* softint: enqueue recieve requests for new incoming packets */ 1084 static void 1085 vioif_rx_softint(void *arg) 1086 { 1087 struct vioif_softc *sc = arg; 1088 1089 vioif_populate_rx_mbufs(sc); 1090 } 1091 1092 /* free all the mbufs; called from if_stop(disable) */ 1093 static void 1094 vioif_rx_drain(struct vioif_softc *sc) 1095 { 1096 struct virtqueue *vq = &sc->sc_vq[VQ_RX]; 1097 int i; 1098 1099 for (i = 0; i < vq->vq_num; i++) { 1100 if (sc->sc_rx_mbufs[i] == NULL) 1101 continue; 1102 vioif_free_rx_mbuf(sc, i); 1103 } 1104 } 1105 1106 1107 /* 1108 * Transmition implementation 1109 */ 1110 /* actual transmission is done in if_start */ 1111 /* tx interrupt; dequeue and free mbufs */ 1112 /* 1113 * tx interrupt is actually disabled; this should be called upon 1114 * tx vq full and watchdog 1115 */ 1116 static int 1117 vioif_tx_vq_done(struct virtqueue *vq) 1118 { 1119 struct virtio_softc *vsc = vq->vq_owner; 1120 struct vioif_softc *sc = device_private(vsc->sc_child); 1121 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1122 int r = 0; 1123 1124 VIOIF_TX_LOCK(sc); 1125 1126 if (sc->sc_stopping) 1127 goto out; 1128 1129 r = vioif_tx_vq_done_locked(vq); 1130 1131 out: 1132 VIOIF_TX_UNLOCK(sc); 1133 if (r) 1134 vioif_start(ifp); 1135 return r; 1136 } 1137 1138 static int 1139 vioif_tx_vq_done_locked(struct virtqueue *vq) 1140 { 1141 struct virtio_softc *vsc = vq->vq_owner; 1142 struct vioif_softc *sc = device_private(vsc->sc_child); 1143 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1144 struct mbuf *m; 1145 int r = 0; 1146 int slot, len; 1147 1148 KASSERT(VIOIF_TX_LOCKED(sc)); 1149 1150 while (virtio_dequeue(vsc, vq, &slot, &len) == 0) { 1151 r++; 1152 bus_dmamap_sync(vsc->sc_dmat, sc->sc_txhdr_dmamaps[slot], 1153 0, sizeof(struct virtio_net_hdr), 1154 BUS_DMASYNC_POSTWRITE); 1155 bus_dmamap_sync(vsc->sc_dmat, sc->sc_tx_dmamaps[slot], 1156 0, sc->sc_tx_dmamaps[slot]->dm_mapsize, 1157 BUS_DMASYNC_POSTWRITE); 1158 m = sc->sc_tx_mbufs[slot]; 1159 bus_dmamap_unload(vsc->sc_dmat, sc->sc_tx_dmamaps[slot]); 1160 sc->sc_tx_mbufs[slot] = 0; 1161 virtio_dequeue_commit(vsc, vq, slot); 1162 ifp->if_opackets++; 1163 m_freem(m); 1164 } 1165 1166 if (r) 1167 ifp->if_flags &= ~IFF_OACTIVE; 1168 return r; 1169 } 1170 1171 /* free all the mbufs already put on vq; called from if_stop(disable) */ 1172 static void 1173 vioif_tx_drain(struct vioif_softc *sc) 1174 { 1175 struct virtio_softc *vsc = sc->sc_virtio; 1176 struct virtqueue *vq = &sc->sc_vq[VQ_TX]; 1177 int i; 1178 1179 KASSERT(sc->sc_stopping); 1180 1181 for (i = 0; i < vq->vq_num; i++) { 1182 if (sc->sc_tx_mbufs[i] == NULL) 1183 continue; 1184 bus_dmamap_unload(vsc->sc_dmat, sc->sc_tx_dmamaps[i]); 1185 m_freem(sc->sc_tx_mbufs[i]); 1186 sc->sc_tx_mbufs[i] = NULL; 1187 } 1188 } 1189 1190 /* 1191 * Control vq 1192 */ 1193 /* issue a VIRTIO_NET_CTRL_RX class command and wait for completion */ 1194 static int 1195 vioif_ctrl_rx(struct vioif_softc *sc, int cmd, bool onoff) 1196 { 1197 struct virtio_softc *vsc = sc->sc_virtio; 1198 struct virtqueue *vq = &sc->sc_vq[VQ_CTRL]; 1199 int r, slot; 1200 1201 if (vsc->sc_nvqs < 3) 1202 return ENOTSUP; 1203 1204 mutex_enter(&sc->sc_ctrl_wait_lock); 1205 while (sc->sc_ctrl_inuse != FREE) 1206 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1207 sc->sc_ctrl_inuse = INUSE; 1208 mutex_exit(&sc->sc_ctrl_wait_lock); 1209 1210 sc->sc_ctrl_cmd->class = VIRTIO_NET_CTRL_RX; 1211 sc->sc_ctrl_cmd->command = cmd; 1212 sc->sc_ctrl_rx->onoff = onoff; 1213 1214 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 1215 0, sizeof(struct virtio_net_ctrl_cmd), 1216 BUS_DMASYNC_PREWRITE); 1217 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_rx_dmamap, 1218 0, sizeof(struct virtio_net_ctrl_rx), 1219 BUS_DMASYNC_PREWRITE); 1220 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 1221 0, sizeof(struct virtio_net_ctrl_status), 1222 BUS_DMASYNC_PREREAD); 1223 1224 r = virtio_enqueue_prep(vsc, vq, &slot); 1225 if (r != 0) 1226 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1227 r = virtio_enqueue_reserve(vsc, vq, slot, 3); 1228 if (r != 0) 1229 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1230 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_cmd_dmamap, true); 1231 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_rx_dmamap, true); 1232 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_status_dmamap, false); 1233 virtio_enqueue_commit(vsc, vq, slot, true); 1234 1235 /* wait for done */ 1236 mutex_enter(&sc->sc_ctrl_wait_lock); 1237 while (sc->sc_ctrl_inuse != DONE) 1238 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1239 mutex_exit(&sc->sc_ctrl_wait_lock); 1240 /* already dequeueued */ 1241 1242 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 0, 1243 sizeof(struct virtio_net_ctrl_cmd), 1244 BUS_DMASYNC_POSTWRITE); 1245 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_rx_dmamap, 0, 1246 sizeof(struct virtio_net_ctrl_rx), 1247 BUS_DMASYNC_POSTWRITE); 1248 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 0, 1249 sizeof(struct virtio_net_ctrl_status), 1250 BUS_DMASYNC_POSTREAD); 1251 1252 if (sc->sc_ctrl_status->ack == VIRTIO_NET_OK) 1253 r = 0; 1254 else { 1255 printf("%s: failed setting rx mode\n", 1256 device_xname(sc->sc_dev)); 1257 r = EIO; 1258 } 1259 1260 mutex_enter(&sc->sc_ctrl_wait_lock); 1261 sc->sc_ctrl_inuse = FREE; 1262 cv_signal(&sc->sc_ctrl_wait); 1263 mutex_exit(&sc->sc_ctrl_wait_lock); 1264 1265 return r; 1266 } 1267 1268 static int 1269 vioif_set_promisc(struct vioif_softc *sc, bool onoff) 1270 { 1271 int r; 1272 1273 r = vioif_ctrl_rx(sc, VIRTIO_NET_CTRL_RX_PROMISC, onoff); 1274 1275 return r; 1276 } 1277 1278 static int 1279 vioif_set_allmulti(struct vioif_softc *sc, bool onoff) 1280 { 1281 int r; 1282 1283 r = vioif_ctrl_rx(sc, VIRTIO_NET_CTRL_RX_ALLMULTI, onoff); 1284 1285 return r; 1286 } 1287 1288 /* issue VIRTIO_NET_CTRL_MAC_TABLE_SET command and wait for completion */ 1289 static int 1290 vioif_set_rx_filter(struct vioif_softc *sc) 1291 { 1292 /* filter already set in sc_ctrl_mac_tbl */ 1293 struct virtio_softc *vsc = sc->sc_virtio; 1294 struct virtqueue *vq = &sc->sc_vq[VQ_CTRL]; 1295 int r, slot; 1296 1297 if (vsc->sc_nvqs < 3) 1298 return ENOTSUP; 1299 1300 mutex_enter(&sc->sc_ctrl_wait_lock); 1301 while (sc->sc_ctrl_inuse != FREE) 1302 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1303 sc->sc_ctrl_inuse = INUSE; 1304 mutex_exit(&sc->sc_ctrl_wait_lock); 1305 1306 sc->sc_ctrl_cmd->class = VIRTIO_NET_CTRL_MAC; 1307 sc->sc_ctrl_cmd->command = VIRTIO_NET_CTRL_MAC_TABLE_SET; 1308 1309 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 1310 sc->sc_ctrl_mac_tbl_uc, 1311 (sizeof(struct virtio_net_ctrl_mac_tbl) 1312 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), 1313 NULL, BUS_DMA_WRITE|BUS_DMA_NOWAIT); 1314 if (r) { 1315 printf("%s: control command dmamap load failed, " 1316 "error code %d\n", device_xname(sc->sc_dev), r); 1317 goto out; 1318 } 1319 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 1320 sc->sc_ctrl_mac_tbl_mc, 1321 (sizeof(struct virtio_net_ctrl_mac_tbl) 1322 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), 1323 NULL, BUS_DMA_WRITE|BUS_DMA_NOWAIT); 1324 if (r) { 1325 printf("%s: control command dmamap load failed, " 1326 "error code %d\n", device_xname(sc->sc_dev), r); 1327 bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap); 1328 goto out; 1329 } 1330 1331 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 1332 0, sizeof(struct virtio_net_ctrl_cmd), 1333 BUS_DMASYNC_PREWRITE); 1334 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 0, 1335 (sizeof(struct virtio_net_ctrl_mac_tbl) 1336 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), 1337 BUS_DMASYNC_PREWRITE); 1338 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 0, 1339 (sizeof(struct virtio_net_ctrl_mac_tbl) 1340 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), 1341 BUS_DMASYNC_PREWRITE); 1342 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 1343 0, sizeof(struct virtio_net_ctrl_status), 1344 BUS_DMASYNC_PREREAD); 1345 1346 r = virtio_enqueue_prep(vsc, vq, &slot); 1347 if (r != 0) 1348 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1349 r = virtio_enqueue_reserve(vsc, vq, slot, 4); 1350 if (r != 0) 1351 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1352 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_cmd_dmamap, true); 1353 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_tbl_uc_dmamap, true); 1354 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_tbl_mc_dmamap, true); 1355 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_status_dmamap, false); 1356 virtio_enqueue_commit(vsc, vq, slot, true); 1357 1358 /* wait for done */ 1359 mutex_enter(&sc->sc_ctrl_wait_lock); 1360 while (sc->sc_ctrl_inuse != DONE) 1361 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1362 mutex_exit(&sc->sc_ctrl_wait_lock); 1363 /* already dequeueued */ 1364 1365 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 0, 1366 sizeof(struct virtio_net_ctrl_cmd), 1367 BUS_DMASYNC_POSTWRITE); 1368 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 0, 1369 (sizeof(struct virtio_net_ctrl_mac_tbl) 1370 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), 1371 BUS_DMASYNC_POSTWRITE); 1372 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 0, 1373 (sizeof(struct virtio_net_ctrl_mac_tbl) 1374 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), 1375 BUS_DMASYNC_POSTWRITE); 1376 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 0, 1377 sizeof(struct virtio_net_ctrl_status), 1378 BUS_DMASYNC_POSTREAD); 1379 bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap); 1380 bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap); 1381 1382 if (sc->sc_ctrl_status->ack == VIRTIO_NET_OK) 1383 r = 0; 1384 else { 1385 printf("%s: failed setting rx filter\n", 1386 device_xname(sc->sc_dev)); 1387 r = EIO; 1388 } 1389 1390 out: 1391 mutex_enter(&sc->sc_ctrl_wait_lock); 1392 sc->sc_ctrl_inuse = FREE; 1393 cv_signal(&sc->sc_ctrl_wait); 1394 mutex_exit(&sc->sc_ctrl_wait_lock); 1395 1396 return r; 1397 } 1398 1399 /* ctrl vq interrupt; wake up the command issuer */ 1400 static int 1401 vioif_ctrl_vq_done(struct virtqueue *vq) 1402 { 1403 struct virtio_softc *vsc = vq->vq_owner; 1404 struct vioif_softc *sc = device_private(vsc->sc_child); 1405 int r, slot; 1406 1407 r = virtio_dequeue(vsc, vq, &slot, NULL); 1408 if (r == ENOENT) 1409 return 0; 1410 virtio_dequeue_commit(vsc, vq, slot); 1411 1412 mutex_enter(&sc->sc_ctrl_wait_lock); 1413 sc->sc_ctrl_inuse = DONE; 1414 cv_signal(&sc->sc_ctrl_wait); 1415 mutex_exit(&sc->sc_ctrl_wait_lock); 1416 1417 return 1; 1418 } 1419 1420 /* 1421 * If IFF_PROMISC requested, set promiscuous 1422 * If multicast filter small enough (<=MAXENTRIES) set rx filter 1423 * If large multicast filter exist use ALLMULTI 1424 */ 1425 /* 1426 * If setting rx filter fails fall back to ALLMULTI 1427 * If ALLMULTI fails fall back to PROMISC 1428 */ 1429 static int 1430 vioif_rx_filter(struct vioif_softc *sc) 1431 { 1432 struct virtio_softc *vsc = sc->sc_virtio; 1433 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1434 struct ether_multi *enm; 1435 struct ether_multistep step; 1436 int nentries; 1437 int promisc = 0, allmulti = 0, rxfilter = 0; 1438 int r; 1439 1440 if (vsc->sc_nvqs < 3) { /* no ctrl vq; always promisc */ 1441 ifp->if_flags |= IFF_PROMISC; 1442 return 0; 1443 } 1444 1445 if (ifp->if_flags & IFF_PROMISC) { 1446 promisc = 1; 1447 goto set; 1448 } 1449 1450 nentries = -1; 1451 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 1452 while (nentries++, enm != NULL) { 1453 if (nentries >= VIRTIO_NET_CTRL_MAC_MAXENTRIES) { 1454 allmulti = 1; 1455 goto set; 1456 } 1457 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 1458 ETHER_ADDR_LEN)) { 1459 allmulti = 1; 1460 goto set; 1461 } 1462 memcpy(sc->sc_ctrl_mac_tbl_mc->macs[nentries], 1463 enm->enm_addrlo, ETHER_ADDR_LEN); 1464 ETHER_NEXT_MULTI(step, enm); 1465 } 1466 rxfilter = 1; 1467 1468 set: 1469 if (rxfilter) { 1470 sc->sc_ctrl_mac_tbl_uc->nentries = 0; 1471 sc->sc_ctrl_mac_tbl_mc->nentries = nentries; 1472 r = vioif_set_rx_filter(sc); 1473 if (r != 0) { 1474 rxfilter = 0; 1475 allmulti = 1; /* fallback */ 1476 } 1477 } else { 1478 /* remove rx filter */ 1479 sc->sc_ctrl_mac_tbl_uc->nentries = 0; 1480 sc->sc_ctrl_mac_tbl_mc->nentries = 0; 1481 r = vioif_set_rx_filter(sc); 1482 /* what to do on failure? */ 1483 } 1484 if (allmulti) { 1485 r = vioif_set_allmulti(sc, true); 1486 if (r != 0) { 1487 allmulti = 0; 1488 promisc = 1; /* fallback */ 1489 } 1490 } else { 1491 r = vioif_set_allmulti(sc, false); 1492 /* what to do on failure? */ 1493 } 1494 if (promisc) { 1495 r = vioif_set_promisc(sc, true); 1496 } else { 1497 r = vioif_set_promisc(sc, false); 1498 } 1499 1500 return r; 1501 } 1502 1503 /* change link status */ 1504 static int 1505 vioif_updown(struct vioif_softc *sc, bool isup) 1506 { 1507 struct virtio_softc *vsc = sc->sc_virtio; 1508 1509 if (!(vsc->sc_features & VIRTIO_NET_F_STATUS)) 1510 return ENODEV; 1511 virtio_write_device_config_1(vsc, 1512 VIRTIO_NET_CONFIG_STATUS, 1513 isup?VIRTIO_NET_S_LINK_UP:0); 1514 return 0; 1515 } 1516 1517 MODULE(MODULE_CLASS_DRIVER, if_vioif, "virtio"); 1518 1519 #ifdef _MODULE 1520 #include "ioconf.c" 1521 #endif 1522 1523 static int 1524 if_vioif_modcmd(modcmd_t cmd, void *opaque) 1525 { 1526 int error = 0; 1527 1528 #ifdef _MODULE 1529 switch (cmd) { 1530 case MODULE_CMD_INIT: 1531 error = config_init_component(cfdriver_ioconf_if_vioif, 1532 cfattach_ioconf_if_vioif, cfdata_ioconf_if_vioif); 1533 break; 1534 case MODULE_CMD_FINI: 1535 error = config_fini_component(cfdriver_ioconf_if_vioif, 1536 cfattach_ioconf_if_vioif, cfdata_ioconf_if_vioif); 1537 break; 1538 default: 1539 error = ENOTTY; 1540 break; 1541 } 1542 #endif 1543 1544 return error; 1545 } 1546
Indexes created Tue Sep 23 14:10:03 GMT 2025